package Test;

import java.util.HashMap;
import java.util.Map;

//力扣 138.随机链表的复制

class Node {
    int val;
    Node next;
    Node random;

    public Node(int val) {
        this.val = val;
        this.next = null;
        this.random = null;
    }
}

class Solution {
    public Node copyRandomList(Node head) {
        Map<Node , Node> map = new HashMap<>();
        Node cur = head;
        while(cur!=null){
            Node node = new Node(cur.val);
            map.put(cur,node);
            cur = cur.next;
        }

        cur = head;
        while(cur!=null){
            map.get(cur).next = map.get(cur.next);
            map.get(cur).random = map.get(cur.random);
            cur = cur.next;
        }

        return map.get(head);

    }
}

public class test2 {


    public static void main(String[] args) {

    }

}
